Frankly, I am now an old man now and already knew and understood the material, but I can't help but marvel at how you condense it all into a short video, presented in a form that is complete and easy to follow. I am throughly envious of students today, who have this type of material readily available on RU-vid, easy to understand and in the palm of their hands. Really, I just want to say well done and thank you.
